International organization — In general — Powers — Use of — Detournement de pouvoir — Relevance of unjustified motives — Importance of "essential aim".

Disputes — International courts — Court of European Coal and Steel Community — Costs.

International organization — European Coal and Steel Community — Article 60 of Treaty establishing — Meaning of “discrimination” — Publication of lists of steel prices — Decision of High Authority authorizing steel enterprises to deviate from their published selling prices — Whether decision in violation of Treaty — Meaning of phrase “price-lists applied by enterprises shall be made public” — Whether “price” means “exact price” — Whether publication must be before application of the lists — Whether authorization of existing breaches of a decision of the High Authority amounts to a détournement de pouvoir.